How to read the date code on a relay
Introduction:
Date code / lot number is the number to identify when the component is being manufactured. It is for the factories
production quality control and tracing purposes.
Date code:
There are 3 different date code format on our relays:
1) Three digit code: The first digit represents the year and the remaining two digits represent the week number in a
calendar year, e.g. 451 means week 51 of year 2004.
2) Four digit code: The first two digits represent the year and the remaining two digits represent the week number in
a calendar year, e.g. 0451 means week 51 of year 2004.
3) Five digits code: The first digit represents the year. The second two digits represent the month and the remaining
two digits represent the day, e.g. 41201 means Dec. 1, 2004
Factory code:
A letter following the date code identifies factory location.
Examples:
US Part No: TK1-5V
Date code: 70313
– the relay was
made on March 13
th
2007.
Factory code: B
– Japan factory
(internal use only).
US Part No: AQV412EH
Date code: 431
– 31
st
week,
2004.
Factory code:
Blank – Japan
factory (internal use only).
US Part No: S2EB-5V
Date code: 40113
– January
13
th
2004.
Factory code:
Blank – Japan
factory (internal use only).
Release date: 12/2007
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